Tektronix type 555 oscilloscope, over 100 tubes inside!
Tektronix Type 555 Dual Beam Oscilloscope with over 100 vacuum tubes. See if it works after all these years.
6 months ago 00:21:09 1
8 months ago 00:05:32 3
1 year ago 00:02:00 1
1 year ago 00:14:59 1
4 years ago 00:15:40 1
9 years ago 00:25:12 116
